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<center><b><big><big>AD Parameter and Variable Functions: Example and Test</big></big></b></center>
<code><font color="blue"><pre style='display:inline'>
# include <cppad/cppad.hpp>
bool ParVar(void)
{ bool ok = true;
using CppAD::AD;
using CppAD::VecAD;
using CppAD::Parameter;
using CppAD::Variable;
// declare independent variables and start tape recording
size_t n = 1;
<a href="test_vector.xml" target="_top">CPPAD_TEST_VECTOR</a>< <a href="ad.xml" target="_top">AD</a><double> > x(n);
x[0] = 0.;
ok &= Parameter(x[0]); // x[0] is a paraemter here
CppAD::<a href="independent.xml" target="_top">Independent</a>(x);
ok &= Variable(x[0]); // now x[0] is a variable
// dependent variable vector
size_t m = 2;
<a href="test_vector.xml" target="_top">CPPAD_TEST_VECTOR</a>< <a href="ad.xml" target="_top">AD</a><double> > y(m);
y[0] = 2.;
ok &= Parameter(y[0]); // y[0] does not depend on x[0]
y[1] = abs(x[0]);
ok &= Variable(y[1]); // y[1] does depends on x[0]
// VecAD objects
VecAD<double> z(2);
z[0] = 0.;
z[1] = 1.;
ok &= Parameter(z); // z does not depend on x[0]
z[x[0]] = 2.;
ok &= Variable(z); // z depends on x[0]
// create f: x -> y and stop tape recording
CppAD::<a href="funconstruct.xml" target="_top">ADFun</a><double> f(x, y);
// check that now all <a href="ad.xml" target="_top">AD</a><double> objects are parameters
ok &= Parameter(x[0]); ok &= ! Variable(x[0]);
ok &= Parameter(y[0]); ok &= ! Variable(y[0]);
ok &= Parameter(y[1]); ok &= ! Variable(y[1]);
// check that the VecAD<double> object is a parameter
ok &= Parameter(z);
return ok;
}
</pre>
</font></code>
<hr/>Input File: example/par_var.cpp
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